Hoisting device.



A. E. SPOONER.

HOISTING DEVICE.

APPLIOATION FILED mums, 1913.

1 1 1 1 ,869, Patented Sept. 29, 1914.

2 SHEETSSHEET 1.

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A. E- SPOONER.

HOISTING nsvms.

APPLIUATION FILED MAR. 13. 1913. 1,1 1 1,869, Patented Sept. 29, 1914.

2 SHEETS-"SHEET 2.

wifnesses Znvenfore UNITED STAlEATENT onmon.

ALBERT E. SPOONER, OF RENFBEW, ONTARIO, CANADA.

HOISTING DEVICE.

Specification of Letters Yatent.

Application filed. March 13, 1913. Serial No. 753,969.

To all whom it may concern." Be it known'that I, ALnnRrE. SrooNER,

a subject of the King of Great Britain, and

resident of the town of Renfrew,Provin ce of Ontario, Canada, haveinvented certain new and usefullmprovements in Hoisting Devices,-ofwhich the following is a specification.

The invention relates to improvements in hoisting devices, as describedin the present specification, and illustrated in the accompanyingdrawings that form part of the construction, which may be readilyadapted for exerting a hoisting or similar power of a maximum amountwith a minimum initial power. a

A further object of the invention is to particularly apply the mechanismto a lifting jack, whereby the same will'be comprised within a minimumheight.

In the drawings, Figure 1 is a perspective view of the inventlon. Fig. 2is a plan view of the invent-ion as shown in Fig. 1. Fig. 3 is alongitudinal sectional view of the invention as shown in Fig. 1. Fig. 4is a side elevation view of the invention as apj thereof rounded, andseated 1n the socket plied to a winding drum.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings and particularly to Figs. 1, 2 and 3, 1 is abase plate having the opening 2 therethrough adjacent one end thereof.

3 are angle plates secured in parallel positionone with the other alongthe base plate 1 by the rivetsa.

5 are bracket plates securely riveted to the upright flanges of theangle plates 3 on the outside thereof, and having the ledge strips 6extending along the top thereof.

7 is a top plate bridging the top of the bracket plates 5, and securelyriveted at the sides thereof to the ledge strips 6, said top platehaving the opening 8 therethroug'h corresponding to the opening 2through the 29 extending through suitable orlfices 1n the base plate,said opening 8 as also the opening 2'in the base plate, having thesidelugs 9 and 10 respectively projectingtoward one another. v i i 11 isa rack having the teeth l2 andl3 formed on opposite sides thereof, andthe grooves 14 on the remaining two sides- The rack 11 is insertedthrough the openings 8 and 2, with the lugs 9 and 10 projecting into thegrooves 1 1, and forming an efiicient guide bearing on two sidesofsaidrack, to insure. the proper vertlcal movement thereof through thebase and top plates. '15 is a retaining dog pivotally mounted .onthepin-16 extending through suitable orifices in the upright flanges of theangle plates 3, said retaining dog having the point thereof springheldinto engagement with the .teeth13 of the rack by the spring 17 suitablyarranged between the angle plates3.

18 is a finger extending outwardly from the dog 15, and by means ofwhich'the point Patented Sept. 29, 1914..

so i

of the dog may be operated byhand to be swung out of engagement with theteeth 13 of the rack 11. i

19 is a dog lever pivotally supported on the fulcrum pin 20 insertedthrough suitable orifices in the upright flanges of the angle plates 3'adjacent the teeth 12 of the rack] The dog lever 19 has the end thereofnext the teeth 12 gouged out intermediate of the width thereof to 'formthe socket bearing 21, and leaving the lugs 22 formed at each n, theopposite end of .sideof said bearin' said lever being forked at 23.

24; is a lifting dog havingthe lower end bearing21 of thedog lever 19,and secured dog lever and the slot 26 in the rounded end of-said dog,whereby the lower and rounded end of said dog is at all times certainduring lifting operations to rest firmly uponthe socket bearing 21. 1

26 is a flat spring secured to the dog lever 19, and bearing against thedog 24, :whereby the pointofthe same is normally held into engagementwiththe teeth 12 of .the rackll. I i r l 27 is finger projectingoutwardly from the dog 24;, and by means of which'the said dog may beoperatedbyhand, and sprung out of engagement with the teeth 12.

28 is a fulcrum lever fulcrumed onthepin i when the hoisting. device isset in proper poweight, the rack 11 may be lowered to its uprightflanges of the angle plates 2, one end of said fulcrum lever beingforked at 30, and the opposite end being formed with the arm 31. y

32 is a link pivotally secured between the forked ends 23 and of thelevers 19 and 28 respectively by the pivot pins 33 and 34, whereby saidlevers are secured one to the other for compound action. 35 is a camlever pivotally secured between the upright flanges of the angle plates3 the pin 36 extending through suitable orifices in said angle plates,said lever 35 having the forked cam-shaped end 37, between; which aroller 36 is pivotally mountedto bear against the arm 31 of the lever28, and e-liminate all friction.

38 is a socket formed on the end of the lever opposite the cam end 37.

3 9 is a hand lever which may be inserted in the socket 38 to move thesame up and down with a'prying movement, and thereby operate thehoisting device in the following manner The rack 11 is of course theelementwhich directly does the work of lifting, and for this purpose isprovided with a cap 40 on the upper end thereof, or the said rackmayhave a hook 41 pivotally secured to thelewer end thereof by the pin 42to pnllnpwardly on any object as desired, and

sition, that is, either upon a solid foundation with the weight mountedon the cap 40, or mounted on a suitable superstructure and the hook'extending therebeneath to the extreme lowermost, position by alternatelydisengaging the lifting dog' 24 and retaining dog 15 as hereinbeforeexplained, thus allowing the rack to lower tooth after tooth, until itis imposition to properly start hoisting operations. The hand lever 39is now operated as hereinbefore explained, where by the roller on thecam end 37 pries upon the under side of the arm 31 of the lever 28,saidlever28being so fulcrumed that a very strong downward pull is madeupon the forked end. 23 of the dog lever 19, and the said dog-1 lever 19fulcrumed as hereinbefore explained will thus exert a tremendoushoistinggfor-ce upon theend carrying the dog. 24, whereby the rackisraised a tooth and retai-nedin itselevated position by the retaining dog15. The hand lever when raised to itsfupper position will lower the camend fwith the arm 31 of the lever 28, thereby 0-: descriloed is shown,with the exception that raising. the forked end of the lever 19 andlowering. the dog 24 another tooth on the rack in readiness for anotherlift.

II-rFig. 4 the'mechanism as hereinbefore the rack is replaced by aratchet wheel operatively connected to a winding: drum.

Referring to the said Fig. 4 the base plate es 1-i$ Shown with the angleplates 3 secured thereon as hereinbefore described, and the cam lever35, fulcrum lever 28 and dog lever 19 are pivotally mounted therein onthe pins 36, 29 and 20 respectively, as hereinbefore described, andfurther with the dog 24 carried at one end of said dog lever 19. 43 is aratchet shaft rotatably mounted in the bearings 44 secured to the angleplates in a similar position to the bracket plates 5 hereinbeforedescribed.

45 is a ratchet wheel fixedly mounted on the shaft 43, and engaged. bythe dog 24 in a similar manner to the rack 11 hereinbefore described.

46 is the retaining dog operativcly engaging with the ratchet wheel 45in a similar manner to the dog 15 with the rack 11.

47 is a spur gear fixedly mounted on the shaft 43. r

48 is a winding drum fixedly mounted on the shaft 49, said shaft beingmounted in the bearing brackets 50, and having the spur gear 51 fixedlymounted thereon, and meshing with the spur gear 47.

The base plate 1 and bearing brackets are mounted on the base frame 52,whereby they are a unit in operation, and it will be readily understoodthat the mechanism may be used in this form to rotate the ratchet wheel,and consequently the winding drum to draw upon a cable as desired, inthe same manner as the mechanism has been described for elevating therack.

It will be further understood that any degree of size or arrangement oflever lengths or other parts may be had to secure varying liftingrequirements or other uses of the power without departing from thespirit of my invention, and I do not wish to be confined to the exactconstruction as shown in theaccompanying drawings.

What I claim as my invention is:

1. A device for the purpose specified com prising a pair of angleplates, a rack member vertically movable between said angle plates, aretaining dog pivoted between said angle plates and engaging with saidrack member, a dog lever pivoted between said angle plates, a liftingdog carried by said dog lever and engaging with said rack, a fulcrumlever pivotally supported between said plates and operatively connectedto said dog lever and a hand lever pivotally supported between saidplates and having a cam formed on one end thereof and operativelyengaging with said fulcrum lever.

2. A device for the purpose specified comprising a base plate, a pair ofangle plates secured along said base plate parallel one with the other,a guide plate supported across and above said angle plate toward one endthereof and having lug extensions from two sides of a central openingtherethrough, a rack member vertically movable between said angle platesand through the fulcrum levers linked one to the other to compound thesame and pivotally mounted between said angle plates on the oppositeside of said rack to that engaged by said retaining dog, a springhelddog carried at one end of said fulcrum levers and engaging with saidrack and a cam lever pivoted between said angle plates and operativelyengaging with the opposite end of said fulcrum lever.

3. A device of the class described comprising a toothed member, aplurality of fulcrum levers compounded one with the other, one of saidlevers having a notched end forming a socket bearing, aspringheld'retaining dog engaging with said toothed member, a springhelddog mounted in the socket bearing of one of said fulcrum levers and acam lever operatively actuating one of said fulcrum levers.

4. A device of the class described comprising a pair of angle plates, atoothed member mounted adjacent said angle plates, a retaining dogpivoted between said angle plates and engaging with said toothed member,a dog lever pivoted between said angle plates and having one end thereofforked, a

dog carried by said dog lever at theopposite end of the fork andengaging said toothed member, a fulcrum lever pivoted between said angleplates and having one end thereof forked, a link pivotallyconnecting theforked ends of said dog lever and said fulcrum lever and a cam leveroperatively engaging said fulcrum lever at the end opposite the forkthereof.

Signed at the city of Ottawa, Canada, this fourteenth day of February,1913.

ALBERT E. SPOONER.

In the presence of- K. L. MACGIBBEN, V. BELA'NGER.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissionerot Patents,

Washington, D. 0.

